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CLEANUP AND ABATEMENT ORDS .40. R5-2011- -2-
<br /> VALLEY PACIFIC PETROLEUM SERVICES INC.
<br /> 930 VICTOR ROAD, LODI,SAN JOAQUIN COUNTY
<br /> BACKGROUND
<br /> 3. In June 1985, Mr. Bruce Woolsey of Woolsey operated the Roberts Petroleum Services at
<br /> 930 Victor Road, a card lock fuel distribution facility that consisted of up to six above
<br /> ground storage tanks ("AGTs"), four underground storage tanks ("USTs"), dispenser
<br /> pumps, and a warehouse for the storage and transfer of gasoline and diesel fuels,
<br /> kerosene, and lubricating oils. In April and July of 1985, Woolsey advanced nine
<br /> boreholes (B-1 through B-9) and installed four monitoring wells;"(MW-1 through MW-4) to
<br /> assess areas of hydrocarbon contamination in soil and groundwater. Woolsey detected
<br /> up to 3,300 parts per million ("ppm") of total petroleum hydrocarbons ("TPH"), assumed
<br /> through the summation of individual petroleum hydrocarbon compounds, in B-6 drilled
<br /> near the AGTs.
<br /> 4. In August 1985, Woolsey encountered groundwater at 38 feet belowground surface
<br /> ("bgs") in the monitoring wells. MW-1, the monitoring well drilled closest to,the AGTs,
<br /> contained four inches of liquid phase hydrocarbons ("LFH";.i.e., free product). Woolsey
<br /> sampled MW-1 through MW-4. The groundwater sampled from MW-1 contained 16,000
<br /> micrograms per liter ("pg/L") of TPH as diesel ("TPHd!!), 330 pg/L TPH as gasoline
<br /> ("TPHg"), and elevated concentrations of benzene, toluene, and xylenes. MW-2 through
<br /> MW-4 were non-detect ("ND"). T,hese results indicate that an unauthorized release of
<br /> petroleum hydrocarbons had occurred and that the release had affected soil and
<br /> groundwater beneath the Site. j ��"M
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<br /> 5. In March 1988, MW 1;contained up to,, f of LPH. In;,January 1989, Woolsey installed
<br /> three additional monitoring wells (MW- ugh MW-7) at the warehouse and further
<br /> downgradient of the AGTs, and sampled f dee of the existing four wells; MW-1 was dry
<br /> during repeated sampling attempts. Depth to groundwater varied between 38 and 43
<br /> feet bgs and flowed to the southwest Soil samples collected from borings MW-5 through
<br /> MW-7 did not containTPHd TPHg; benzene; toluene, ethyl benzene, and xylene
<br /> ("BTEX"), or tetraethyl lead ("TEL"). TPHd concentrations ranged from ND to 690 pg/L
<br /> in the'six sampi 'd,wells, with,MW-6 containing the greatest concentrations.
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<br /> 6. In.November 1989, the San Joaquin Environmental Health Division ("SJEHD") observed
<br /> Woolsey remove two 10;000-gallon gasoline USTs, one 10,000-gallon diesel UST, one
<br /> 10,0007gallon kerosene.UST, and, according to the document, "possibly" one 275-gallon
<br /> unleaded gasoline UST: "SJEHD staff observed no staining or odors in soil near the steel
<br /> USTs. Soil samples/collected from the base of the UST excavation were ND for TPH,
<br /> BTEX, organic lead, and ethylene di bromide ("EDB").
<br /> 7. In April 1990, Woolsey installed monitoring well MW-8 adjacent to MW-1, which had
<br /> gone dry, and collected groundwater samples from the newly installed well, MW-2, MW-
<br /> 4, MW-5, MW-6, and MW-7. Soil samples from MW-8 contained TPHg and TPHd.
<br /> Groundwater samples from the monitoring wells did not contain the analyzed petroleum
<br /> constituents except MW-8, which contained 520 pg/L of TPHg and low concentrations of
<br /> BTEX.
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